Precision electroweak measurements on the Z resonance

被引：1536

作者：

Schael, S ^{[136
]}

Barate, R

Brunelière, R

Buskulic, D

De Bonis, I

Decamp, D

Ghez, P

Goy, C

Jézéquel, S

Lees, JP

Lucotte, A

Martin, F

Merle, E

Minard, MN

Nief, JY

Odier, P

Pietrzyk, B

Trocmé, B

Bravo, S

Casado, MP

Chmeissani, M

Comas, P

Crespo, JM

Fernandez, E

Fernandez-Bosman, M

Garrido, L

Grauges, E

Juste, A

Martinez, M

Merino, G

Miquel, R

Mir, LM

Orteu, S

Pacheco, A

Park, IC

Perlas, J

Riu, I

Ruiz, H

Sanchez, F

Colaleo, A

Creanza, D

De Filippis, N

de Palma, M

Iaselli, G

Maggi, G

Maggi, M

Nuzzo, S

Ranieri, A

Raso, G

Ruggieri, F

机构：

[1] Rhein Westfal TH Aachen, Inst Phys, D-52056 Aachen, Germany

[2] IN2P3, CNRS, LAPP, F-74019 Annecy Le Vieux, France

[3] Autonomous Univ Barcelona, Inst Fis Altes Energies, E-08193 Bellaterra, Barcelona, Spain

[4] Ist Nazl Fis Nucl, Sez Bari, Dipartimento Fis, I-70126 Bari, Italy

[5] Acad Sinica, Inst High Energy Phys, Beijing, Peoples R China

[6] CERN, European Lab Particle Phys, CH-1211 Geneva 23, Switzerland

[7] Univ Blaise Pascal, CNRS, IN2P3, Phys Corpusculaire Lab, F-63177 Aubiere, France

[8] Niels Bohr Inst, DK-2100 Copenhagen, Denmark

[9] NRCD, GR-15310 Athens, Greece

[10] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France

[11] Univ Florence, Dipartimento Fis, Ist Nazl Fis Nucl, Sez Firenze, I-50125 Florence, Italy

[12] Florida State Univ, Supercomp Computat Res Inst, Tallahassee, FL 32306 USA

[13] Ist Nazl Fis Nucl, LNF, I-00044 Frascati, Italy

[14] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[15] Utah Valley State Coll, Orem, UT 84058 USA

[16] Heidelberg Univ, Kirchhoff Inst Phys, D-69120 Heidelberg, Germany

[17] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2BZ, England

[18] Univ Innsbruck, Inst Expt Phys, A-6020 Innsbruck, Austria

[19] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[20] Catholic Univ Louvain, Dept Phys, Inst Phys Nucl, B-1348 Louvain, Belgium

[21] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[22] Univ Mediterranee, CNRS, IN2P3, Ctr Phys Particules Marseille, F-13288 Marseille, France

[23] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[24] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[25] Werner Heisenberg Inst Phys, Max Planck Inst Phys, D-80805 Munich, Germany

[26] Univ Paris 11, CNRS, IN2P3, Accelerateur Lineaire Lab, F-91898 Orsay, France

[27] Univ Pisa, Ist Nazl Fis Nucl, Sez Pisa, Dipartimento Fis, I-56010 Pisa, Italy

[28] Univ London, Royal Holloway & Bedford New Coll, Dept Phys, Egham TW20 0EX, Surrey, England

[29] Rutherford Appleton Lab, Particle Phys Dept, Didcot OX11 0QX, Oxon, England

[30] CE Saclay, CEA, DAPNIA, Serv Phys Paricules, F-91191 Gif Sur Yvette, France

[31] Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA

[32] Univ Sheffield, Dept Phys, Sheffield S3 7RH, S Yorkshire, England

[33] Univ Siegen, Fachbereich Phys, D-57068 Siegen, Germany

[34] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy

[35] Ist Nazl Fis Nucl, Sez Triest, I-34127 Trieste, Italy

[36] Univ Washington, Expt Elementary Particle Phys, Seattle, WA 98195 USA

[37] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[38] ETH Honggerberg, Inst Particle Phys, CH-8093 Zurich, Switzerland

[39] CERN, PH Dept, CH-1211 Geneva 23, Switzerland

[40] INAF, Sez Torino, IFSI, Turin, Italy

[41] Univ Montpellier 2, Grp Astroparticules Montpellier, F-34095 Montpellier, France

[42] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[43] Univ Barcelona, E-08028 Barcelona, Spain

[44] Univ Turin, Ist Fis Gen, I-10125 Turin, Italy

[45] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[46] Univ Antwerp, Dept Phys, B-2610 Antwerp, Belgium

[47] VUB, ULB, IIHE, B-1050 Brussels, Belgium

[48] Univ Etat Mons, Fac Sci, B-7000 Mons, Belgium

[49] Univ Athens, Dept Phys, GR-10680 Athens, Greece

[50] Univ Bergen, Dept Phys, NO-5007 Bergen, Norway

来源：

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS | 2006年 / 427卷 / 5-6期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1016/j.physrep.2005.12.006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLID experiment using a polarised beam at SLC. The measurements include cross-sections, forward-backward asymmetries and polarised asymmetries. The mass and width of the Z boson, m(Z) and Gamma(Z), and its couplings to fermions, for example the p parameter and the effective electroweak mixing angle for leptons, are precisely measured: m(Z) = 91.1875 +/- 0.0021 GeV, Gamma(Z) = 2.4952 +/- 0.0023 GeV, rho(l) = 1.0050 +/- 0.0010, sin(2)theta(eff)(lept) = 0.23153 +/- 0.00016. The number of light neutrino species is determined to be 2.9840 +/- 0.0082, in agreement with the three observed generations of fundamental fermions. The results are compared to the predictions of the Standard Model (SM). At the Z-pole, electroweak radiative corrections beyond the running of the QED and QCD coupling constants are observed with a significance of five standard deviations, and in agreement with the Standard Model. Of the many Z-pole measurements, the forward-backward asymmetry in b-quark production shows the largest difference with respect to its SM expectation, at the level of 2.8 standard deviations. Through radiative corrections evaluated in the framework of the Standard Model, the Z-pole data are also used to predict the mass of the top quark, m(t) = 173(+10)(+13) GeV, and the mass of the W boson, m(W) = 80.363 +/- 0.032 GeV. These indirect constraints are compared to the direct measurements, providing a stringent test of the SM. Using in addition the direct measurements of m(t) and m(W), the mass of the as yet unobserved SM Higgs boson is predicted with a relative uncertainty of about 50% and found to be less than 285 GeV at 95% confidence level. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：257 / 454

页数：198

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